title: Interferometric vibration sensor using phase-generated carrier method.
abstract: An interferometric fiber-optic vibration sensing system using the phase-generated carrier (PGC) method is proposed and experimentally demonstrated. The sensing section consists of a Sagnac interferometer combined with a Mach-Zehnder interferometer, a length of sensing fiber is shared between the two interferometers. The PGC demodulation scheme is used to demodulate the time-varying phase shifts induced by vibrations. Spatial information can be extracted from the demodulated results. A prototype sensing system with a 628 m long sensing fiber has been tested and a spatial resolution better than 12 m is successfully achieved.
authors.forename: Yang
authors.initials: Y
authors.lastname: Li
authors.forename: Zhibo
authors.initials: Z
authors.lastname: Liu
authors.forename: Yan
authors.initials: Y
authors.lastname: Liu
authors.forename: Lin
authors.initials: L
authors.lastname: Ma
authors.forename: Zhongwei
authors.initials: Z
authors.lastname: Tan
authors.forename: Shuisheng
authors.initials: S
authors.lastname: Jian